One of the oldest settlements in the Lycian region with the name of Tlos was written on Lycian as TLAWA on Lycian inscriptions. Hittite documents were referred to as ' Dlawa in Lukka Lands'. The north east side of the Acropolis was formed by steep cliffs and was built on a hill. A castle at the top of the hill belonging to the Ottoman period hides the older remains that were built by Ali Aga who dominated the area in 14th century. Under the Castle the ruins of a Lycian wall on its eastern slope, there is an example of a city wall with Roman period stonework to its south. The Lycian tombs on the same hill are outstanding. Stadium's stone blocks seats descending towards stands at the south of the city walls. The remains of baths in the south of the ruins and of Paleasta and the gymnasium are nearby. The Agora of Tlos which is located at the east part of the big square is 9 metres in width, it is such a large structure that it has half a dozen doors in the west face of the wall. A very well preserved theatre on the east of the same square and its inscription 'IZRARA MONUMENT' can be partially seen under the north wall . One of the most important tombs is no doubt the figure of a three-headed monster of Chimera on Pegasus (winged horse) depicted on ' Bellerophontes ' grave. The entrance and pediment between the two rectangular columns takes place on the temple tomb's wall of the main grave room in three stages. There is a gate adorned with brass motifs and the main doors at both sides enter the burial room. The doors are made of blocks that are decorated with horse motifs. The left wall on the entrance front faces the threshold and acts as relief for the 90cm blocks. Bellerophontes are on the top of the entrance of the left wall.